Grinding machine



July 28, 1925.

J. HARRIS GRINDING MACHINE Filed April 9, 1921 2 Sheets-Sheet 1 @XM RJuly 28, 1925.v 1,547,387

J. HARRIS GRINDING MACHINE FiledApril 9, 1921 2 sheets-snm z y f gM/fffizatented July 255, 1925, l

JCLN I-ARRS, OF LAKEXVOOD, OHIO.

GRINILDING MACHINE.

Application led April 9,

To @ZZ 107mm it may conce/w.'

-Be it known that I, JoHN Hannie, a citizen of the United States,residing` at Lakewood, in the county of Cuyahoo'a and State f Qhio, haveinvented a cerf` fn new and useful improve" xnt in Grinding liachines,of which the follofving` a full, clear, and err.- act description,reference being` had to the accoinpanyingg drawings.

This invention relates to grindingl machines and, in the embodimentshown herein, is particularly well adapted for finishing the ends ofobjects such as tips for blowpipes, which ends are liable to be providedwith burrs, projections or inequalitiesi 1t is the general purpose andobject of the invention to provide machine of t t chai-- acter which issimple and econon'iical of production, and which is particularlyeliicient in operation. Further and more l` ted objects of the inventionwill be set forth hereinafter and are realized in and through thecombinations of elements embodied in the claims hereto appended.

ln the drawings, Fig'. 1 represents a side elevation of a machineconstructed in accordance with my invention; F igs. 2, 3 and 4tsectional views corresponding, respectively, to the lines 2 2, 3 8, and4% of Fig. 1, the worm gear, the rotating platform and the track being`shown in elevation in Fig. 3; and Fig. 5 an enlarged sectional detailthrough one of the sockets in which 'the tips are inoiinted,'sliowiiigthe manner of supporting the tip therein and upon a track therebeneath.

Describing?,` the various parts by reference characters, 1 and 2 denotea pair of end uprights, each of which may be a metal channel, as shown,and supporting at their upper ends a cross member 3, which may also beof channel shape, with its flanges projecting upwardly, and convenientlysecured to the members 1 and 2 by angle brackets 4. Supported by thesaid members '1 and 2 through angle brackets 5 is an intermediate crossmember 6. The lower ends of the uprights may be braced by strut members7 secured thereto and to the floor or foundation and may also beconnected by a rod 8. Carried by the uprights 1 and 2, below the .member6, is a pan-like receptacle comprising the bottom 9 and the side and endwalls 10.

11 denotes a motor mounted upon a base 12, shown as supported by the topmember 1921. Serial No. 459,919.

3. The shaft 13 of the motor is prov'ded with a pulley 141i by means ofwhich and a pisiley l'and belt 16, a shaft 17 is driven, the said shaftbeingshown 4as journaled in supports V18 interposed between and carriedby the members 3 and 6. The shaft 17 is provided at the end opposite thepulley 15 with a worm 1Ta meshing with a rm gear 19 upon a verticalshaft 20 journaled in the members 3 and 6 and projecting` downwardlyinto the pan, through a cover a partly closing the top of the same. Thelower end of the shaft 2O is provided with a grinding;l wheel 21,preferably of carborundum. rihe shaft is provided also with a bevelpinion 22 meshing with a bevel gear 23 on a shaft 2d journaled in aU-shaped bracket 25. rthe shaft 24 is provided at the end opposite thegear 23 with a pinion 26 meshing,` with a pinion 27 on a stud 28, thelatter pinion meshing with a gear 29 on a shaft 30, the said shaft beingprovided with a worm 31 meshing with a worm gear 32, rigid with avertical shaft 33 mounted in the members 3 and 6 and having? its lowerend provided with aA rotary platform 8st.

The platform 3e is preferably in the shape of a diskhavingaperipheralseries of bores therethrough, each having an upwardly extending sleeve36 and constituting` sockets.

Supported on a suitablebracket 37v and adjustablestandards S6-38a is anarcuate track comprisingA an upwardly inclined member 39 and asubstantially horizontal member 10. The track is positioned beneath theplatform 34, beneath the sockets 36, with its central or intermediateportion supported by the said bracket. The portion or member of thetrack extends from the bracket 37 to a point slightly above the uppersurface of the grinding wheel 21, having its upper end supported by theadjustable standard The portion or member t0 entends from the bracket 37to a point adjacent to but positioned slightly below the upper surfaceof the wheel 21 where it is supported by the adjustable standard 38a.These standards are mounted in the -pan 9 and serve to adjust the endsof the track 39, 4L() to compensate forthe wear on the grinding wheel.

lVith the parts constructed and arranged as described power will betransmitted from the motor shaft 13, through pulleys- 14 and and belt 16to the shaft 17 and thence by the worm 172L and worm gear 19 to theshaft 20, driving the grinding wheel 21. By means of the reducing-gearconnections between the shaft 20 and the platform 34, the latter will bedriven at a slow speed, as

compared with the grinding wheel 2l, in the ence of particles ofabrasive material on said Y section, such particles being removed fromthe wheel 21 during its operation. rIhe tips l1 will fit loosely withintheir sleeves 36 and openings 35 so that their lower ends may be pressedby gravity into engagement with the rapidly rotating grinding wheel. Bythe time when the tips shall have traveled across the surface of thegrinding wheel, the buri's or other projections on the lower endsthereof will have been removed, and the tips thus finished may beremoved as soon as they again reach the track member 39; or the operatormay remove them as they are brought to him along the track member 39 bythe rotation of the platform; the operator replacing the finished tipswith unfinished o-nes.

In operation the foregoing machine has been found to be particularlyefficient, finishing olf the ends of some sixty tips per minute andrequiring the attention of but a single attendant. Furthermore, as willbe evident from the drawing, the machine by which this result isaccomplished is extremely simple and economical of production. It willalso be noted in this connection that the grinding action takes placeover the entire surface of the wheel 2l, hence the wheel is worn downevenly and does not require redressing.

After the tips have had their lower ends ground in the manner described,they may be inserted into a standard type of burnishing machine 42,mounted on the upright 2, the work-receiving bushing of such machinebeing indicated at 43. The pan 9 serves to collect the lings orparticles ground from the ends of the tips. If desired, the track member40 may be dispensed with, in which case the tips will be dropped intothe pan as they are carried from the upper surface of the grinding wheelby the rotary platform.

I-Iaving thus described my invention, what I claim is:

l. Inamachine of the character described,

lower ends of the articles placed therewith# in, said track member beinginclined upwardly with its delivery end substantially flush withtheupper surface of said wheel, Y

and means for driving said platform.

2. In a machine of the character described, the combination of avertical shaft, a grinding wheel carried thereby, means for driving saidshaft, a second vertical shaft, a rotary platform mounted on the secondshaft above and overlapping the upper surface of the grinding wheel, thesaid platform having a peripheral series of sockets adapted to supportarticles therein with their lower ends in engagement with the uppersurface of the grinding wheel, speed reducing connections between thesaid shafts, and a segmental track beneath the portion of the platformextending beyond the grinding wheel and adapted to support the articlesin said sock ets, one lend of said track extending upwardly in order to`deliver the articles car- Y ried by -said sockets to the upper surfaceof said grinding wheel, and the other end of said track being positionedbelow the upper surface of the grinding wheel and adapted to receive theground articles.

3. Inamachine of the character described, the combination of asubstantially horizontal grinding wheel, a rotary platformabove andoverlapping the upper surface ofthe grinding wheel, the said platformhaving a series of sockets adapted to support articles therein withtheir lower ends in engagement by gravity with the upper surface ofthegrinding Wheel, a track beneath the portion of the platform extendingbeyond the grinding wheel and adapted to support the articles in saidsockets, one end of said track extending upwardly in order to deliverthe articles carried by said sockets to the upper surface of saidgrinding wheel, the other end of said track being positioned below theupper surface of the grinding wheel and adapted to receive the groundarticles, and means for driving the said wheel and platform.

In testimony whereof, I hereunto aflix my signature.

JOHN HARRIS.

